Bluesil RTV 3445 A
BLUESIL RTV 3445 A — Base for addition-cure silicone, Shore A 45, low mixing viscosity 13,000 mPa·s.
BLUESIL RTV 3445 A — Base with a Shore A hardness of 45 and low mixing viscosity (13,000 mPa·s).
20 kg bucket. With catalyst 3445 B (blue) in a 100:10 ratio. Pot life: 60 min; tear strength: 10 kN/m. For detailed molds with medium hardness. From our Swiss warehouse.
documents
Internal reference:
40-2157.KE
HS Code:
39100000
BLUESIL RTV 34xx Series – addition-curing mold-making silicones with a range of hardness levels
The BLUESIL RTV 34xx family is Elkem’s range of two-component, polyaddition-curing silicone elastomers for mold making and prototyping. All variants are platinum-cured and cure at room temperature without off-gassing —the mold shrinks only minimally (0.1%), the material is chemically and thermally resistant, and the detail resolution is in the submicrometer range.
The key difference between the variants is the Shore A hardness, which ranges from 12 (very soft, for pad printing pads) to 50 (hard, for durable production molds). Choose the appropriate variant based on your application:
| Variant | Shore A | pot life | Demold | main use |
|---|---|---|---|---|
| RTV 3410 QC | 12 | 10 min | 30–40 min | Pad printing pads, tile rollers |
| RTV 3428 | 28 | 60 min | 4:00 p.m. | Composite molds (aerospace, boat building) |
| RTV 3430 SB | 28 | 180 minutes | 24 hours | Self-bleeding, delicate reproduction |
| RTV 3440 | 40 | 90 min | 6 hours | Standard mold, quick demolding |
| RTV 3445 | 45 | 60 min | 24 hours | medium-hard, lower mixing viscosity |
| RTV 3450 | 50 | 90 min | 4:00 p.m. | The toughest version, production molds |
Materials that can be cast include plaster, wax, polyester, polyurethane, epoxy, low-melting-point metals, and many other casting materials.
What's in this container?
Base component A (viscous liquid). Mix with catalyst B in a ratio of 100:10. 20-kg bucket of base component.
BLUESIL RTV 3445 in detail
With a Shore A hardness of 45, BLUESIL RTV 3445 falls between RTV 3440 (40) and RTV 3450 (50). The lower mixing viscosity (13,000 vs. 15,000 mPa·s for 3440/3450) and the shorter pot life of 60 minutes make the product particularly suitable for small, highly detailed geometries. Tear strength 10 kN/m (higher than 3440 and 3450) – the part can withstand greater mechanical stress.
Typical applications
- Detailed shapes with medium hardness
- Applications where low mixing viscosity aids flow into narrow gaps
- Standard reproduction of 3D objects with good edge definition
Inhibition Warning
Platinum-cured RTVs are inhibited in trace amounts by:
- Natural or synthetic rubber containing sulfur (natural rubber, NBR, neoprene gloves)
- Metal-salt-catalyzed condensation RTV (tin)
- Tin-stabilized PVC
- Epoxides cured with amines
- Certain organic solvents (ketones, alcohols, ethers)
Practical advice: Set aside a separate venting chamber for addition-cure RTV; if in doubt, conduct a preliminary test at a test site.
storage
Can be stored for up to 12 months in unopened original packaging at temperatures between −10°C and +30°C.
BLUESIL RTV 3445 A is supplied by SILITECH AG with technical support, a batch certificate, and shipping from our Swiss warehouse within 24 hours.
Technische Daten zu Bluesil RTV 3445 A
| product information | |
|---|---|
| manufacturer | Elkem Silicones |
| brand | Bluesil |
| container | 5 kg, 20 kg, 25 kg |
| network type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| mixing ratio | 10:1 |
| Additional features | |
|---|---|
| UV resistance | No |
| Areas of application | |
|---|---|
| Main application | Formenbau, Prototyping |
| Physical properties | |
|---|---|
| Paint cured | beige |
| Self-leveling | Yes |
| consistency | Flowable |
| Electrical Properties | |
|---|---|
| Electrical insulation | No |
| product approvals | |
|---|---|
| food contact | No |
| Suitable for medical use | No |
| General | |
|---|---|
| Density (g/cm³) | 1.3 |
| Viskosität unvernetzt (mPa·s) | 40,000 |
| mixing ratio | 10 to 1 |
| Pot life (min) | 90 |
| Entformzeit (min) | 24 |
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 300 |
| Reißfestigkeit (N/mm) | 9 |
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Frequently Asked Questions About BLUESIL RTV 3445 A
Answers regarding the application and processing of BLUESIL RTV 3445 A.
Addition-cure silicones (platinum) cross-link without producing by-products, resulting in minimal shrinkage (0.1%) and high dimensional stability. Condensation-cure RTV silicones shrink significantly more (0.4–1.2%). Addition-cure silicones are the first choice for dimensionally accurate prototypes and production molds.
Check the substrate before pouring: Contact with sulfur, tin, amines, or certain solvents will halt the curing process. Conduct a preliminary test using a small test strip to be sure. A separate venting chamber for addition-cure RTV reduces cross-contamination.
Yes, using heat up to a maximum of 60°C to minimize shrinkage. Higher temperatures significantly shorten the pot life and can cause dimensional changes—for precise shapes, room-temperature curing is preferred.
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Unser Technik-Team berät Sie persönlich bei Materialauswahl, Verarbeitungsfragen und individuellen Anforderungen — schnell und kompetent.
product specifications
| product information | |
|---|---|
| container | 5 kg or 20 kg or 25 kg |
| manufacturer | Elkem Silicones |
| brand | Bluesil |
| network type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| mixing ratio | 10:1 |
| Additional features | |
|---|---|
| UV resistance | No |
| Areas of application | |
|---|---|
| Main application | Mold making or Prototyping |
| Physical properties | |
|---|---|
| Paint cured | beige |
| Self-leveling | Yes |
| consistency | Flowable |
| Electrical Properties | |
|---|---|
| Electrical insulation | No |
| product approvals | |
|---|---|
| food contact | No |
| Suitable for medical use | No |
| Uncategorized | |
|---|---|
| Density (g/cm³) | 1.3 |
| Viskosität unvernetzt (mPa·s) | 40,000 |
| mixing ratio | 10 to 1 |
| Pot life (min) | 90 |
| Entformzeit (min) | 24 |
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 300 |
| Reißfestigkeit (N/mm) | 9 |
| keywords | |
|---|---|
| keywords | |
| Mechanical properties | |
|---|---|
| Shore A hardness | 45.0 Shore A |
| tensile strength | 4.0 MPa |
| elongation at break | 300.0 % |
| Tear resistance | 10.0 kN/m |
| Linear shrinkage | < 0.1% |
| processing | |
|---|---|
| Viscosity of the mixture | 13,000 mPa·s |
| Viscosity Comp. A | 40,000 mPa·s |
| Viscosity Comp. B | 200 mPa·s |
| Pot life at 23°C | 60.0 min |
| demolding time | 1,440.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.3 g/cm³ |
| Temperature resistance (duration) | -55 to 200 °C |
| Peak temperature (short-term) | 200 °C |
| storage | |
|---|---|
| Shelf life in original packaging | 12 months |
| Storage temperature | -10 to 30 °C |